[NaCl SDK] A bunch of spelling fixes.

native_client_sdk/src/tools/getos.py

Index: native_client_sdk/src/tools/getos.py
diff --git a/native_client_sdk/src/tools/getos.py b/native_client_sdk/src/tools/getos.py
index 6e2813c6f2499ca66d8f951739da9fbe38ac2f6f..bd312b4b90241a529a55cef8e120f6172326f025 100755
--- a/native_client_sdk/src/tools/getos.py
+++ b/native_client_sdk/src/tools/getos.py
@@ -118,13 +118,13 @@ def GetChromePath():
 
 def GetNaClArch(platform):
   if platform == 'win':
-    # On windows the nacl arch always maches to system arch
+    # On windows the nacl arch always matches to system arch
     return GetSystemArch(platform)
   elif platform == 'mac':
     # On Mac the nacl arch is currently always 32-bit.
     return 'x86_32'
 
-  # On linux the nacl arch matches to chrome arch, so we inspect the chome
+  # On linux the nacl arch matches to chrome arch, so we inspect the chrome
   # binary using objdump
   chrome_path = GetChromePath()